Chapter 18 Interactions of Living Things

The study of the interactions between organisms and their environment Click for Term

Ecology The study of the interactions between organisms and their environment Click for Term

Living factors in the environment Click for Term

Biotic Living factors in the environment Click for Term

Nonliving factors in the environment Click for Term

Abiotic Nonliving factors in the environment Click for Term

A group of individuals of the same species that live together in the same area at the same time Click for Term

Population A group of individuals of the same species that live together in the same area at the same time Click for Term

All of the populations of different species that live and interact in an area Click for Term

Community All of the populations of different species that live and interact in an area Click for Term

A community of organisms and their nonliving environment Click for Term

Ecosystem A community of organisms and their nonliving environment Click for Term

The part of the Earth where life exists Click for Term

Biosphere The part of the Earth where life exists Click for Term

A consumer that eats plants Click for Term

Herbivore A consumer that eats plants Click for Term

A consumer that eats animals Click for Term

Carnivore A consumer that eats animals Click for Term

A consumer that eats a variety of organisms Click for Term

Omnivore A consumer that eats a variety of organisms Click for Term

An animal that feeds on the bodies of dead animals Click for Term

Scavenger An animal that feeds on the bodies of dead animals Click for Term

A diagram that represents how energy in food molecules flows from one organism to the next Click for Term

Food Chain A diagram that represents how energy in food molecules flows from one organism to the next Click for Term

A complex diagram representing the many pathways in a real ecosystem Click for Term

Food web A complex diagram representing the many pathways in a real ecosystem Click for Term

A diagram shaped like a triangle showing the loss of energy at each level of the food chain Click for Term

Energy pyramid A diagram shaped like a triangle showing the loss of energy at each level of the food chain Click for Term

The environment where an organism lives Click for Term

Habitat The environment where an organism lives Click for Term

An organism’s way a life and its relationship with its abiotic and biotic environment Click for Term

Niche An organism’s way a life and its relationship with its abiotic and biotic environment Click for Term

The largest population that a given environment can support over a long period of time Click for Term

Carrying capacity The largest population that a given environment can support over a long period of time Click for Term

An organism that is eaten by another organism Click for Term

Prey An organism that is eaten by another organism Click for Term

An organism that eats other organisms Click for Term

Predator An organism that eats other organisms Click for Term

A close, long-term association between two or more species Click for Term

Symbiosis A close, long-term association between two or more species Click for Term

A symbiotic relationship in which both organisms benefit Click for Term

Mutualism A symbiotic relationship in which both organisms benefit Click for Term

A symbiotic relationship in which one organism benefits and the other is unaffected Click for Term

Commensalism A symbiotic relationship in which one organism benefits and the other is unaffected Click for Term

A symbiotic association in which one organism benefits while the other is harmed Click for Term

Parasitism A symbiotic association in which one organism benefits while the other is harmed Click for Term

Long-term changes that take places in two species because of their close interactions with one another Click for Term

Coevolution Long-term changes that take places in two species because of their close interactions with one another Click for Term